NetBSD Problem Report #41277

From www@NetBSD.org  Sat Apr 25 03:29:23 2009
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Date: Sat, 25 Apr 2009 03:29:22 +0000 (UTC)
From: lidl@pix.net
Reply-To: lidl@pix.net
To: gnats-bugs@NetBSD.org
Subject: libc/gdtoa/hdtoa.c will not compile on vax with gcc 4.3.3
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>Number:         41277
>Category:       port-vax
>Synopsis:       libc/gdtoa/hdtoa.c will not compile on vax with gcc 4.3.3
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-vax-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 25 03:30:00 +0000 2009
>Last-Modified:  Sat Apr 25 14:15:02 +0000 2009
>Originator:     Kurt Lidl
>Release:        netbsd-5
>Organization:
>Environment:
cross-building for a vax, from a solaris x86 machine,
using gcc 4.3.3

>Description:
Since I spent a bunch of time getting gcc 4.3.3 to run
as a cross-compiler in the netbsd tree, I figured I'd
see if it could work for something other than a coldfire.

I picked the vax, since I know its support in gcc is,
um, a little weak.

Anyway:

#   compile  libc/hdtoa.o
/nbsd/vax-5/tools/bin/vax--netbsdelf-gcc -O1 -fgcse -fstrength-reduce -fgcse-after-reload -Wall -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wno-sign-compare -Wno-traditional -Wa,--fatal-warnings -Wreturn-type -Wswitch -Wshadow -Wcast-qual -Wwrite-strings -Wextra -Wno-unused-parameter -std=gnu99  -Werror  -pipe  -fstack-protector -Wstack-protector --param ssp-buffer-size=1   -D_LIBC -DLIBC_SCCS -DSYSLIBC_SCCS -D_REENTRANT -DHESIOD -DINET6 -DNLS -DYP -I/nbsd/nbsd-5/lib/libc/include -I/nbsd/nbsd-5/lib/libc -I. -I/nbsd/nbsd-5/sys -I/nbsd/nbsd-5/lib/libc/compat/stdlib -I/nbsd/nbsd-5/lib/libc/compat/../stdlib -I/nbsd/nbsd-5/lib/libc/../../common/lib/libc/quad -I/nbsd/nbsd-5/lib/libc/../../common/lib/libc/string -I/nbsd/nbsd-5/lib/libc/../../common/lib/libc/arch/vax/string -D__DBINTERFACE_PRIVATE -I/nbsd/nbsd-5/libexec/ld.elf_so -I/nbsd/nbsd-5/lib/libc/dlfcn -I/nbsd/nbsd-5/lib/libc/gdtoa -DNO_FENV_H -I/nbsd/nbsd-5/lib/libc/arch/vax/gdtoa -DWITH_RUNE -I/nbsd/nbsd-5/lib/
 libc -DPOSIX_MISTAKE -DCOMPAT__RES -DUSE_POLL -DPORTMAP -DWIDE_DOUBLE -DALL_STATE -DUSG_COMPAT  -D_FORTIFY_SOURCE=2  -nostdinc -isystem /nbsd/vax-5/nbuild/usr/include -c    /nbsd/nbsd-5/lib/libc/gdtoa/hdtoa.c -o hdtoa.o
cc1: warnings being treated as errors
/nbsd/nbsd-5/lib/libc/gdtoa/hdtoa.c: In function '__hdtoa':
/nbsd/nbsd-5/lib/libc/gdtoa/hdtoa.c:164: error: floating constant exceeds range of 'double'


>How-To-Repeat:
build libc with gcc 4.3.3

>Fix:

>Audit-Trail:
From: christos@zoulas.com (Christos Zoulas)
To: gnats-bugs@NetBSD.org, port-vax-maintainer@netbsd.org, 
	gnats-admin@netbsd.org, netbsd-bugs@netbsd.org
Cc: 
Subject: Re: port-vax/41277: libc/gdtoa/hdtoa.c will not compile on vax with gcc 4.3.3
Date: Sat, 25 Apr 2009 10:13:15 -0400

 On Apr 25,  3:30am, lidl@pix.net (lidl@pix.net) wrote:
 -- Subject: port-vax/41277: libc/gdtoa/hdtoa.c will not compile on vax with g

 | >Number:         41277
 | >Category:       port-vax
 | >Synopsis:       libc/gdtoa/hdtoa.c will not compile on vax with gcc 4.3.3
 | >Confidential:   no
 | >Severity:       serious
 | >Priority:       medium
 | >Responsible:    port-vax-maintainer
 | >State:          open
 | >Class:          sw-bug
 | >Submitter-Id:   net
 | >Arrival-Date:   Sat Apr 25 03:30:00 +0000 2009
 | >Originator:     Kurt Lidl
 | >Release:        netbsd-5
 | >Organization:
 | >Environment:
 | cross-building for a vax, from a solaris x86 machine,
 | using gcc 4.3.3
 | 
 | >Description:
 | Since I spent a bunch of time getting gcc 4.3.3 to run
 | as a cross-compiler in the netbsd tree, I figured I'd
 | see if it could work for something other than a coldfire.
 | 
 | I picked the vax, since I know its support in gcc is,
 | um, a little weak.
 | 
 | Anyway:
 | 
 | #   compile  libc/hdtoa.o
 | /nbsd/vax-5/tools/bin/vax--netbsdelf-gcc -O1 -fgcse -fstrength-reduce -fgcse-after-reload -Wall -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wno-sign-compare -Wno-traditional -Wa,--fatal-warnings -Wreturn-type -Wswitch -Wshadow -Wcast-qual -Wwrite-strings -Wextra -Wno-unused-parameter -std=gnu99  -Werror  -pipe  -fstack-protector -Wstack-protector --param ssp-buffer-size=1   -D_LIBC -DLIBC_SCCS -DSYSLIBC_SCCS -D_REENTRANT -DHESIOD -DINET6 -DNLS -DYP -I/nbsd/nbsd-5/lib/libc/include -I/nbsd/nbsd-5/lib/libc -I. -I/nbsd/nbsd-5/sys -I/nbsd/nbsd-5/lib/libc/compat/stdlib -I/nbsd/nbsd-5/lib/libc/compat/../stdlib -I/nbsd/nbsd-5/lib/libc/../../common/lib/libc/quad -I/nbsd/nbsd-5/lib/libc/../../common/lib/libc/string -I/nbsd/nbsd-5/lib/libc/../../common/lib/libc/arch/vax/string -D__DBINTERFACE_PRIVATE -I/nbsd/nbsd-5/libexec/ld.elf_so -I/nbsd/nbsd-5/lib/libc/dlfcn -I/nbsd/nbsd-5/lib/libc/gdtoa -DNO_FENV_H -I/nbsd/nbsd-5/lib/libc/arch/vax/gdtoa -DWITH_RUNE -I/nbsd/nbsd-5/li
  b/
 |  libc -DPOSIX_MISTAKE -DCOMPAT__RES -DUSE_POLL -DPORTMAP -DWIDE_DOUBLE -DALL_STATE -DUSG_COMPAT  -D_FORTIFY_SOURCE=2  -nostdinc -isystem /nbsd/vax-5/nbuild/usr/include -c    /nbsd/nbsd-5/lib/libc/gdtoa/hdtoa.c -o hdtoa.o
 | cc1: warnings being treated as errors
 | /nbsd/nbsd-5/lib/libc/gdtoa/hdtoa.c: In function '__hdtoa':
 | /nbsd/nbsd-5/lib/libc/gdtoa/hdtoa.c:164: error: floating constant exceeds range of 'double'
 | 

 Perhaps something like this (I am just guessing).

 christos

 Index: hdtoa.c
 ===================================================================
 RCS file: /cvsroot/src/lib/libc/gdtoa/hdtoa.c,v
 retrieving revision 1.6
 diff -u -u -r1.6 hdtoa.c
 --- hdtoa.c	21 Mar 2008 23:13:48 -0000	1.6
 +++ hdtoa.c	25 Apr 2009 14:12:32 -0000
 @@ -161,8 +161,15 @@
  		*decpt = 1;
  		return (nrv_alloc("0", rve, 1));
  	case FP_SUBNORMAL:
 +#ifdef __vax__
 +		/* (DBL_MAX_EXP=127 / 2) + 2 = 65? */
 +		u.dblu_d *= 0x1p65;
 +		*decpt = u.dblu_dbl.dbl_exp - (65 + DBL_ADJ);
 +#endif
 +		/* (DBL_MAX_EXP=1024 / 2) + 2 = 514? */
  		u.dblu_d *= 0x1p514;
  		*decpt = u.dblu_dbl.dbl_exp - (514 + DBL_ADJ);
 +#endif
  		break;
  	case FP_INFINITE:
  		*decpt = INT_MAX;

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